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AZ1L Direct-V iew LCD T elevision Chassis Circuit Description and T roubleshooting Guide T raining Manual MODELS: KDL22EX308 KDL32EX308 Course : CTV -68 KDL32EX308.
CTV -63 i Power Supply ....................................................................... 4 KDL22EX308 .......................................................................... 4 KDL32EX308 .......................................................
CTV -63 ii T able of Contents (Continued) Introduction .................................................................... 24 LCD Panel Basics .............................................................. 24 Gate Drivers ............................
CTV -68 1 Chapter 1 – Introduction Overview The AZ1L chassis is one of several designs for the 2010 model line of Sony Bravia® LCD televisions. Several models will be released incorporating this chassis.
Chapter 1 - Introdcution CTV -68 2 USB2.0 Side Input This feature was available in selected 2008 models and allowed the viewing of JPEG formatted pictures and playback of MP3 audio files. The media content has been expanded this year to allow playback of MPEG1 and MPEG2 format video content.
CTV -68 3 Chapter 2 – Overall Circuit Descriptions Overview The primary circuits contained in the AZ1L chassis consists of a main circuit board (designated as the BAL board), power supply (GD1 Or G2LE) which varies based on the size of the LCD display , and the LCD panel assembly .
Chapter 2 - Overall Circuit Description CTV -68 4 Power Supply KDL22EX308 The KDL22EX308 utilizes the GD1 power supply board. There are 3 distinct sections on the power supply: Standby Supply : Continuously operational as long as AC power is applied, the standby supply generates 3.
Chapter 2 - Overall Circuit Description CTV -68 5 FIGURE 2-1 22EX308 OVERALL BLOCK DIAGRAM C OMP OSI T E OR C OMP ON E N T 1 R F C OMP OSI T E 3 C OMP ON E N T 2 H D MI 1 PC H D 1 5 POW E R S U P P LY.
Chapter 2 - Overall Circuit Description CTV -68 6 FIGURE 2-2 32EX308 OVERALL BLOCK DIAGRAM C OMP OS I TE OR C OMP ON E N T 1 R F C OMP OS I TE 3 C OMP ON E N T 2 H D MI 1 PC H D 1 5 POW E R S U PP LY .
CTV -68 7 Chapter 3 – T roubleshooting Introduction Most troubleshooting of this chassis focuses on the 3 major components used: • The Main Board (BAL) • Power Supply (G1D or G2LE) • LCD Panel.
Chapter 3 - T roubleshooting CTV -68 8 FIGURE 3-1 CHECKING THE SOFTW ARE VERSION Software Update Responsibility Software updates are designed to be performed by the customer . W arranty repairs in which the issue can be resolved by a software update are not reimbursable .
Chapter 3 - T roubleshooting CTV -68 9 Special Software Instructions for BAL Board or LCD Panel Replacement The 2010 models utilize a “generic” type BAL board. In the past, many different main boards needed to be stocked due to dif ferences in software requirements.
Chapter 3 - T roubleshooting CTV -68 10 V ideo Failures Problems that develop in the video circuits can appear as subtle or major distortions, a loss of one or more colors, improper video level, or a complete loss of video.
Chapter 3 - T roubleshooting CTV -68 1 1 FIGURE 3-2 NO VIDEO TROUBLESHOOTING FLOWCHAR T N o Vi de o B ack li gh t s t ur ned on ? U nplug LVD S c onn ec t or at TC ON w hile un i t is ru nnin g .
Chapter 3 - T roubleshooting CTV -68 12 TCON : Since the TCON allocates the RGB video information based on specific timing information, the distortions tend to be fixed and usually appear as symmetrical patterns that occupy most (or a significant portion) of the display .
Chapter 3 - T roubleshooting CTV -68 13 FIGURE 3-3 VIDEO DISTOR TION TROUBLESHOOTING FLOWCHAR T Vi d eo Di stort i on I s dis t or t i on across entire s c ree n ? Any hor iz on t al lines ? No No TC .
Chapter 3 - T roubleshooting CTV -68 14 Audio T roubleshooting Since all audio signals are input, processed and amplified by the BAL board, any issue involving the loss of audio or audio distortions which is present at all inputs would dictate that issue is remedied by replacement of the BAL board.
Chapter 3 - T roubleshooting CTV -68 15 N o Pow er Is s t andb y LE D blinking ? No Ye s GE3 b oard ( 32 , 4 0 " ) GE 2B boa rd (46 / 52 " ) GE 2A ( 60") No See pro t ec t ion fl owc ha.
Chapter 3 - T roubleshooting CTV -68 16 Protection Shutdown Critical voltages and circuit operations are monitored by the CPU on the BAL board. If a fault is detected the unit will be forced to shut down by the CPU. The monitored circuit in which the fault occurred will cause the CPU to flash the standby LED in groups of repeating sequences.
Chapter 3 - T roubleshooting CTV -68 17 FIGURE 3-5 PROTECT SHUTDOWN TROUBLESHOOTING FLOWCHART Protect Sh utdown . Standby LED Bl i n ki ng No Ye s No LCD P an el Ye s 2X BA L B oar d 3X 5X D oes s t a.
Chapter 3 - T roubleshooting CTV -68 18 FIGURE 3-6 DIAGNOSTICS HISTOR Y P AGE Backlight Issues Under normal circumstances, any failures in the backlighting system will cause the unit to shut down.
Chapter 3 - T roubleshooting CTV -68 19 T est Points The drawing in Figure 3-7 contains the board-to-board connector and pin information for the KDL22EX308 to identify voltages, signal and control lines for troubleshooting purposes. Figure 3-8 illustrates the same information for the KDL32EX308.
Chapter 3 - T roubleshooting CTV -68 20 FIGURE 3-7 KDL22EX308 TEST POINTS HV 1 STBY 3.3V AUDIO _12V AC_O FF _DET PO WE R_O N 1 2 3 4 AUDIO _G ND BL _E RR REG 12V _GND REG 12 V 5 6, 7 8, 9 10 BL _O N TCON _12 V DIMME R N /C 11 12 13 14 TCON _O N 15 C N 6 150 STBY 3.
Chapter 3 - T roubleshooting CTV -68 21 FIGURE 3-8 KDL32EX308 TEST POINTS UNREG 24V BL - ON G ND BL _E RR 1~5 6~10 11 12 STBY 3.3V AUDIO _1 2V AC_O FF _DET PO WE R_O N 1 2 3 4 AUDIO _G ND BL _E RR REG 12V _GND REG 12 V 5 6, 7 8, 9 10 BL _O N TCON _12 V DIMME R N /C 11 12 13 14 TCON _O N 15 AC IN ( N ) AC IN ( H ) 1 2 C N 6 401 STBY 3.
Chapter 3 - T roubleshooting CTV -68 22 FIGURE 3-9 KDL22EX308 BOARD LOCA TIONS G D 1 BAL H LR SWITC H BL O C K.
Chapter 3 - T roubleshooting CTV -68 23 FIGURE 3-10 KDL32BX300 BOARD LOCA TIONS G D 2LE BAL H LR SWITC H BL O C K.
CTV -68 24 Chapter 4 – Appendix TCON T roubleshooting Introduction Beginning in the fall of 2008, Sony announced the availability of limited TCON replacement boards to service LCD panels beginning with certain models going back to 2006. For many years technicians have been asking about the availability of these components.
Chapter 4 - Appendix CTV -68 25 Figure 4-1 illustrates a typical LCD panel and the associated video processing circuits as found in the W AX3 chassis. The various formats and resolutions of video signals are processed on the BU1 board. All video signals exit the video processor in the native resolution of the LCD panel.
Chapter 4 - Appendix CTV -68 26 FIGURE 4-1 TYPICAL LCD TIMING CONTROL LC D PA N E L GATE D R I V E R S SOU R C E D R I V E R S LVD S TR A N S MI TT E R BU LVD S R E C E I V E R TC ON VI D E O PR OC E .
Chapter 4 - Appendix CTV -68 27 Gate Drivers Referring to Figure 4-1, note the IC’s located along the side of the panel. These IC’s are mounted on a flexible cable(s) which are bonded to the LCD panel. Their function is to activate each row of pixels one at a time starting with the first line at the top.
Chapter 4 - Appendix CTV -68 28 D E FE C TI V E D R I V E I C D E FE C TI V E TA B B ON D OR D R I V E I C D E FE C TI V E TA B B ON D OR D R I V E I C FIGURE 4-2 TYPICAL LCD P ANEL F AILURES.
Chapter 4 - Appendix CTV -68 29 Failures involving the LCD panel are usually displayed with the following symptoms: • Physical damage such as cracks in the panel, a single pixel or group of pixels that always on or off, or random sections of the panel which are completely dark.
Chapter 4 - Appendix CTV -68 30 Figure 4-3 illustrates 2 examples of a loss of control data to the drive IC’s. In the first example, an entire group of column drivers has lost the data stream for red. The second example involves the complete loss of drive data for all RGB information to the right side of the screen.
Chapter 4 - Appendix CTV -68 31 Examples of Actual TCON Failures The remaining illustrations show other TCON failures that have been encountered in the field. The idea is to get a grasp of the concept of TCON induced failures to avoid unnecessary parts replacement.
Chapter 4 - Appendix CTV -68 32 MUL TIPLE EVENL Y SP ACED LINES NOT AFFECTED BY PICTURE ZOOMING LOADED SOURCE DRIVE DA T A LINE SYMETRICAL RED BOXES.
Chapter 4 - Appendix CTV -68 33 LCD Panel Failures Below are some photos of actual LCD panel failures. Note that most issues tend to be isolated to a certain area of the screen with the exception of failures of the source drivers. The source drivers can cause thin horizontal line issues and can also affect a large area of the screen.
Chapter 4 - Appendix CTV -68 34 SOURCE T AB BOND F AILURE MUL TIPLE PIXEL F AILURE GA TE T AB BOND F AILURE GA TE T AB BOND F AILURE.
and i.Link are trademarks of Sony Electronics 2007 Sony Electornics, Inc. SEL Service Company 16530 Vill Esprillo National T raining Dept. MZ3215 San Diego, CA 92127 Reproduction in whole or part without written permission is prohibited.
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